Replicated Irrigated Small Plot Roundup Ready Flex Cotton Variety Demonstration, Panhandle, TX

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1 Replicated Irrigated Small Plot Roundup Ready Flex Cotton Variety Demonstration, Panhandle, TX Cooperator: Geneo Abbe Brent Bean, 1 Randy Boman, 1 Jody Bradford, 2 Mark Kelley, 3 Jake Robinson, 4 and Bob Villarreal 4 Summary: The difference in the highest and lowest net value among varieties at this location was $418.16/acre, indicating the importance of variety selection. Average lint yield was excellent at 1,811 lbs/acre. Lint yield ranged from a low of 1,455 lb/acre for NexGen 1551RF to a high of 2,184 lb/acre for FiberMax 9058F. Lint loan values ranged from $0.4730/lb for NexGen 1572RF to $0.5789/lb for NexGen 1551RF. After subtracting out ginning and seed/technology costs, the highest net value varieties were FiberMax 9058F,($1,225.34/acre), NexGen 3410RF ($1,106.81/acre), and FiberMax 9060F ($1,082.85). Objective: The objective of this project was to compare yields, gin turnout, fiber quality, and economics of transgenic varieties under irrigated production systems. Materials and Methods: Varieties: AFD 5064F, Deltapine 110RF, Deltapine 121RF, FiberMax 9058F, FiberMax 9060F, FiberMax 9068F, FiberMax 9150F, NexGen 1551RF, NexGen 1556RF, NexGen 1572RF, NexGen 3410RF, NexGen 3550RF, and PhytoGen 125RF Experimental design: Seeding rate: Plot size: Randomized complete block with 4 replications 3.75 seed per row-ft in 30-inch row spacing (65,000 seed/acre) One 30 inch row by 100 ft long Planting date: May 15 Weed management: Rainfall and irrigation: Direx plus Dual herbicides were applied pre-emergence broadcast. A total of 9.31 inches of rainfall accumulated at this location during the growing season May 15 - Oct 31. In addition, 4.28 inches of water was applied by center pivot irrigation. Estimated soil water use 1 Extension Agronomist, Amarillo, Extension Agronomist-Cotton, Lubbock 2 Moore County Ag Agent 3 Extension Program Specialist 4 AgriLife Research Technician

2 was 4.24 inches. Total water used during the growing season (soil water/rainfall/irrigation) was inches. Insecticides: Fertilizer management: Harvest: Gin turnout: Fiber analysis: Ginning cost and seed values: Seed and technology cost: Temik was applied in-furrow at planting. No other insecticides were used at this site during the growing season. 45 lb N/acre, 35 lb P 2 O 5 /acre, 10 lb K 2 O/acre, and 22 lb S/acre were applied prior to planting. Plots were harvested on October 30th by hand harvesting 20 ft of row. Samples were weighed and adjusted to lb/acre. Sub-samples were collected and ginned at the Texas AgriLife Research and Extension Center near Lubbock to determine gin turnouts. Lint samples were submitted to the International Textile Center at Texas Tech University for HVI analysis, and Commodity Credit Corporation (CCC) loan values were determined for each variety by plot. Ginning costs were based on $2.45 per cwt. of bur cotton and seed value/acre was based on $150/ton of seed. Ginning costs did not include checkoff. Seed and technology costs were calculated using the appropriate seeding rate (seed/row-ft) for the row spacing and entries using the online Plains Cotton Growers Seed Cost Comparison Worksheet with Monsanto Cap Cost Thresholds. Available at: Results and Discussion: Although heat units were scarce early in the season, a warm August and September resulted in excellent cotton yields at this location. Of all the yield and quality factors measured, only seed turnout was not significantly different among varieties (Tables 1 and 2). Average lint yield was 1,811 lbs/acre and was achieved with 9.3 inches of rainfall and 4.3 inches of irrigation water. Soil moisture conditions were excellent at planting. Lint turnout averaged 26.8% with a range of 23.3% to 29.1%. Lint yield ranged from a low of 1,455 lb/acre for NexGen 1551RF to a high of 2,184 lb/acre for FiberMax 9058F. Although NexGen 1551RF had the lowest lint yield, it also had the highest lint loan value at $0.5789/lb and the second highest micronaire at 3.8. Lowest lint loan value was observed for NexGen 1572RF at $0.4730/lb. Total value (lint value plus seed value) ranged from $1,005.66/acre to a high of $1,464.60/acre and was closely correlated with net value (total value minus ginning and seed/technology cost). Net value ranged from a low of $807.19/acre for NexGen 1572RF to a high of $1,225.34/acre for FiberMax 9058F. The difference in the net value for these two varieties was $418.16/acre. The net value of two varieties, NexGen 3410RF at $1,106.81/acre, and FiberMax 9060F at $1,082.85/acre, were

3 not statistically different from FiberMax 9058F ($1,225.34/acre). In this trial, micronaire ranged from a low of 3.0 for NexGen 1572RF to a high of 4.0 for NexGen 1556RF. The test average for micronaire was 3.4. Staple averaged 37.9 with a low of 36.3 for AFD 5064F and a high of 39.8 for FiberMax 9060F. Uniformity ranged from 80.8% to 83.4% with an average of 81.9%. Test average for strength was 29.3 g/tex with a low of 27.7 g/tex for Deltapine 121RF and a high of 32.7 g/tex for NexGen 1551RF. Percent elongation values ranged from a low of 7.7% for FiberMax 9058F to a high of 9.3% for PhytoGen 125RF. The lowest average leaf grade (2.3) was observed for FiberMax 9058F and FiberMax 9060F and the highest (5.0) for Deltapine 110RF and NexGen 1572RF. Test averages for reflectance (Rd) and yellowness (+b) were 78.5 and 8.4, respectively. Color grades were mostly 21s or 31s in this trial. Acknowledgments: Appreciation is expressed to Geneo Abbe for the use of his land, equipment and labor for this project. Further assistance with this project was provided by Dr. John Gannaway - Texas AgriLife Research and Extension Center, Lubbock, and Dr. Eric Hequet - Associate Director, International Textile Center, Texas Tech University. Disclaimer Clause: Trade names of commercial products used in this report are included only for better understanding and clarity. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Texas A&M University System is implied. Readers should realize that results from one experiment do not represent conclusive evidence that the same response would occur where conditions vary.

4 Table 1. Harvest results from the small-plot replicated Roundup Ready Flex demonstration, Geneo Abbe Farm, Panhandle, TX, Entry Lint Seed Bur cotton Lint Seed Lint loan Lint Seed Total Ginning Seed/technology Net turnout turnout yield yield yield value value value value cost cost value % lb/acre $/lb $/acre FiberMax 9058F a NexGen 3410RF ab FiberMax 9060F ab FiberMax 9068F bc NexGen 3550RF bc Deltapine 110RF bcd Deltapine 121RF bcd NexGen 1556RF bcde FiberMax 9150F cde PhytoGen 125RF cde NexGen 1551RF de AFD 5064F de NexGen 1572RF e Test average CV, % OSL < < < LSD 1.9 NS For net value/acre, means within a column with the same letter are not significantly different at the 0.05 probability level. CV - coefficient of variation. OSL - observed significance level, or probability of a greater F value. LSD - least significant difference at the 0.05 level. Note: some columns may not add up due to rounding error. Assumes: $2.45/cwt ginning cost. $150/ton for seed. Value for lint based on CCC loan value from grab samples and ITC HVI results.

5 Table 2. HVI fiber property results from the small-plot replicated Roundup Ready Flex demonstration, Geneo Abbe Farm, Panhandle, TX, Entry Micronaire Staple Uniformity Strength Elongation Leaf Rd +b Color grade units 32 nds inches % g/tex % grade reflectance yellowness color 1 color 2 AFD 5064F Deltapine 110RF Deltapine 121RF FiberMax 9058F FiberMax 9060F FiberMax 9068F FiberMax 9150F NexGen 1551RF NexGen 1556RF NexGen 1572RF NexGen 3410RF NexGen 3550RF PhytoGen 125RF Test average CV, % OSL < < < < < < LSD CV - coefficient of variation. OSL - observed significance level, or probability of a greater F value. LSD - least significant difference at the 0.05 level.